<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="姓名" id="i1">
<input type="text" placeholder="工资" id="i2">
<input type="text" placeholder="工作" id="i3">
<input type="button" value="添加" onclick="add()">
<table border="1">
  <caption>员工列表</caption>
  <tr>
    <th>姓名</th><th>工资</th><th>工作</th>
  </tr>

</table>
<script>
  //得到三个文本框
  let i1 = document.querySelector("#i1");
  let i2 = document.querySelector("#i2");
  let i3 = document.querySelector("#i3");
  //得到table
  let table = document.querySelector("table");
  function add() {
    //创建1个tr和3个td
    let tr = document.createElement("tr");
    let nameTd = document.createElement("td");
    let salaryTd = document.createElement("td");
    let jobTd = document.createElement("td");
    //把文本框的值设置到td里面
      nameTd.innerText = i1.value;
      salaryTd.innerText = i2.value;
      jobTd.innerText = i3.value;
      //把td装进tr
      tr.append(nameTd,salaryTd,jobTd);
      //把tr装进table
      table.append(tr);


  }
</script>
</body>
</html>